メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.464289605108 40.580096106877, 141.464129106515 40.5812434738088, 141.46399888354 40.5820398657793, 141.463959009838 40.582264351126, 141.464021964835 40.5825060740195, 141.464115347808 40.5828381846096, 141.463555295044 40.5825015524168, 141.462642213465 40.5819183726509, 141.461590237857 40.5812588665218, 141.462265658536 40.5809170805538, 141.463095531129 40.5805539757455, 141.463932006872 40.580236455809, 141.464289605108 40.580096106877)) ^^http://www.opengis.net/ont/geosparql#wktLiteral